Ballygomartin Radio Station

Originally, I believed this site was an Air Traffic Control (ATC) Exchange or Repeater Station. Since then I have learned that the site was a microwave radio link connecting Northern Ireland with mainland Great Britain, via a corresponding site at Enoch Hill, near Stranraer in Scotland. I originally visited twice between 2008 and 2009 and believe the site was abandoned within the year. I have since visited in 2016 when all the structures on the site had been removed, with only the fencing remaining. At the time of my original visits, no equipment remained and the site did not appear to have any residual function. It was clear from the security surrounding the site that this had key national infrastructure importance and required protection, including a permanent military guard; the signs of which remained at the time of my visits. Very little information is available on this site, and as I find out any more I will endeavour to publish it and update this page.

The rural site in a discreet location in the hills over Belfast.

Concrete anti-vehicle blocks preventing access around the perimeter.

The site commands great views over Belfast.

The two transmitter antenna.

The secure main gates.

Warning signs and layers of protection around the perimeter.

The main gate from the inside.

The accommodation block.

Burned out bed frames outside the accommodation block. There appears to have been a fire inside the block, so perhaps these were dragged out by the fire brigade or were pulled out and set alight maliciously. They may also have been first removed as part of the decommissioning process.

Inside what appears to have been the OPS room for the military guard stationed here.

Inside the accommodation block. This is the room where the soldiers would have slept.

Exchange / Repeater Station Diary

Tower 1.

The rear of the accommodation block.

The transmitter towers and instrumentation building.

The exterior of the main instrumentation building of the transmitter station.

Power distribution boards inside the main instrumentation building.

A very dark view of the now destroyed instrumentation building.

Observation post around the perimeter.

The unloading bay for the military armed guard.

Update 2017

After the publication of the book “Spies at Gilnahirk,” I noted reference to an original General Post Office (GPO) radio station at Ballygomartin. This took me on a new line of research regarding this site. A number of physical signs on this site led me to believe there was more to it than met the eye. Directional microwave antennae, high security including an armed section of soldiers and an electric fence, and reference to a communications facility on the site for nearly 100 years. There is reference to this radio station in a number of online sources, some of which refer to a more clandestine use of the station.

In Wireless World, 27 December 1935, in an article called Short Range Telephony, A year in Progress, they noted that the most notable advance made during the year was the opening of the Post Office (GPO) circuit between Scotland and Northern Ireland. It was in operation under experimental conditions at the close of 1934, but rapidly developed into a stable commercial circuit. The Scottish station was at Portpatrick, and the Irish one at Ballygomartin.

GPO Station near Leafield near Oxford. This station is similar in construction to that at Ballygomartin if you look under the modern render and support buildings.

According to National Archive records, Gilnahirk radio station began as part of the Radio Security Service (RSS) in January 1942 after a temporary station at Ballygomartin closed down in November 1940. It was built by the Post Office and was designed to intercept illicit wireless transmissions emanating from within the UK and locate their position by direction finding.

Following the erection of a new antenna at the GPO site in 1935, a question was asked in parliament regarding the volume of traffic through the station. Of the 60,000 calls made in the 6 months prior to 19 March 1936, 19,000 of them were transmitted to Great Britain through the radio station at Ballygomartin.

In the POEEJ Journal (Vol. 52) published in October 1959 reference was made to the erection of a tower at Ballygomartin for the Carlisle – Belfast radio link.

In the Engineer publication, in November 1959, more detail was given regarding the erection of this new tower – “A microwave radio link, engineered and operated by the General Post Office, has been established between Carlisle and Ballygomartin in order to integrate the station with the rest of the I.T.A. network. There are three repeater stations, at Riddings Hill (near Dumfries), Canbrt Hill (near Newton Stewart) and Enoch Hill Portpatrick), on the overland section of this 130-mile route. Beyond Ballygomartrn the television signals are transmitted at video frequency over coaxial cable links to the G.P.O. switching centre at Belfast.”

While I can not remember the source I read that this was an Air Traffic Control (ATC) repeater station, I am confident now that this site was indeed a radio station providing a radio and latterly microwave connection to Great Britain from Northern Ireland. The extent of this connection in the more modern days of the sites operation is unknown, and wether solely civilian traffic was communicated is also unknown. What is certain, is that for around 80 years, this site has played a key part in keeping Northern Ireland connected with the ‘mainland’ and its strategic importance should not be underestimated.

The site has now been demolished with the exception of the security fence. December 2016.While the modern buildings have been removed, signs of previous occupation can be spotted. December 2016.

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Frontline Ulster is a website dedicated to tracing the physical remnants of conflict left within Northern Ireland and Ulster through all eras ranging from the early Home Rule crisis through to the cessation of hostilities and the ending of Operation Banner, the longest deployment of the British Army in history. The site aims to focus on the physical archive and archaeological evidence, with less focus placed on the human or political impact. Image copyright is retained by the author unless otherwise stated, and where possible the source has been referenced. Inclusion on this site of any location is not an implied right of access; always attempt to seek landowner permission. No site is safe, always take care and be mindful of any hidden hazards.